AT&T DataPort PCX Modem User Manual page 59

AT Commands and S-Registers
Table B-1. AT Command and S-Register List (20 of 21)
AT Command/
S-Register
\K n
\N n
%E n
B-20
Issue 2
Description
BUFFER CONTROL, SEND BREAK CONTROL,
BREAK FORCES ESCAPE
Controls whether buffered data is discarded upon a
break sequence (Buffer Control), whether a break
sequence is sent before data (Send Break Control),
and whether a break sequence forces the DataPort
PCX modem into Command mode (Break Forces
Escape).
\K, \K0 Discards data, sends break before data,
and enables Break Forces Escape.
\K1 Discards data, sends break before data,
and disables Break Forces Escape.
\K2 Keeps data, sends break before data, and
enables Break Forces Escape.
\K3 Keeps data, sends break before data, and
disables Break Forces Escape.
\K4 Keeps data, sends data before break, and
enables Break Forces Escape.
\K5 Keeps data, sends data before break,
and disables Break Forces Escape.
OPERATING MODE
Determines the mode to be negotiated in subsequent
connections.
\N, \N0 Buffer mode
\N1 Direct mode (external modem) or Buffer
mode (internal modem)
LINE QUALITY MONITOR
Determines whether and for what purpose the modem
will monitor line quality.
%E, %E0 Disable line quality monitor.
%E1 Enable line quality monitor and auto-retrain.
%E2 Enable line quality monitor and fallback
and fall forward rate negotiation.
July 1995